/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2011-2013 OpenFOAM Foundation
     \\/     M anipulation  |
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.

    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.

    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.

Application
    rhoPimpleFoam

Description
    Transient solver for laminar or turbulent flow of compressible fluids
    for HVAC and similar applications.

    Uses the flexible PIMPLE (PISO-SIMPLE) solution for time-resolved and
    pseudo-transient simulations.

\*---------------------------------------------------------------------------*/

#include "fvCFD.H"
#include "dynamicFvMesh.H"
#include "psiThermo.H"
#include "turbulenceModel.H"
#include "bound.H"
#include "pimpleControl.H"
#include "fvIOoptionList.H"

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

int main(int argc, char *argv[])
{
    #include "setRootCase.H"
    #include "createTime.H"
    #include "createDynamicFvMesh.H"
    #include "initContinuityErrs.H"

    pimpleControl pimple(mesh);

    #include "readControls.H"
    #include "createFields.H"
    #include "createFvOptions.H"
    #include "createPcorrTypes.H"
    #include "CourantNo.H"
    #include "setInitialDeltaT.H"

    // Create old-time absolute flux for ddtPhiCorr
    surfaceScalarField phiAbs("phiAbs", phi);


    // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

    Info<< "\nStarting time loop\n" << endl;

    while (runTime.run())
    {
        #include "readControls.H"
        #include "compressibleCourantNo.H"

        // Make the fluxes absolute before mesh-motion
        fvc::makeAbsolute(phi, rho, U);

        // Update absolute flux for ddtPhiCorr
        phiAbs = phi;

        #include "setDeltaT.H"

        runTime++;

        Info<< "Time = " << runTime.timeName() << nl << endl;

        {
            // Store divrhoU from the previous time-step/mesh for the correctPhi
            volScalarField divrhoU(fvc::div(phi));

            // Do any mesh changes
            mesh.update();

            if (mesh.changing() && correctPhi)
            {
                #include "correctPhi.H"
            }
        }

        // Make the fluxes relative to the mesh-motion
        fvc::makeRelative(phi, rho, U);

        if (mesh.changing() && checkMeshCourantNo)
        {
            #include "meshCourantNo.H"
        }

        if (pimple.nCorrPIMPLE() <= 1)
        {
            #include "rhoEqn.H"
            Info<< "rhoEqn max/min : " << max(rho).value()
                << " " << min(rho).value() << endl;
        }

        // --- Pressure-velocity PIMPLE corrector loop
        while (pimple.loop())
        {
            #include "UEqn.H"
            #include "EEqn.H"

            // --- Pressure corrector loop
            while (pimple.correct())
            {
                #include "pEqn.H"
            }

            if (pimple.turbCorr())
            {
                turbulence->correct();
            }
        }

        runTime.write();

        Info<< "ExecutionTime = " << runTime.elapsedCpuTime() << " s"
            << "  ClockTime = " << runTime.elapsedClockTime() << " s"
            << nl << endl;
    }

    Info<< "End\n" << endl;

    return 0;
}


// ************************************************************************* //
